The Guide,valve Stem, cataloged under National Stock Number 4820-01-179-6565, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-179-6565
Item Name
Guide,valve Stem
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Outside Diameter
4.645 INCHES NOMINAL IN
Material
STEEL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-182-9241NK-979-1POSSIBLE MATCH
HOLDER,VALVE
Possible match (shared part number)Midwood Development Corp
4820-01-182-9242POSSIBLE MATCH
LINK,VALVE
Possible match (shared part number)
5342-01-182-9243POSSIBLE MATCH
CLEVIS,VALVE,TRIP
Possible match (shared part number)
3040-01-182-9496POSSIBLE MATCH
LEVER,REMOTE CONTROL
Possible match (shared part number)
5340-01-184-7858POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)
4730-01-706-6198NP415POSSIBLE MATCH
REPAIR KIT,PIPE,EMERGENCY DAMAGE
Possible match (shared part number)Csc Operating Company Llc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
NP-415
D/9Drawing number reference only
U.S. Government activity
NL-711-1
3/9Design control — primary reference
U.S. Government activity
NP-415 PIECE 6
5/9Secondary reference
U.S. Government activity
Related Parts
4820-01-182-9241POSSIBLE MATCH
HOLDER,VALVE
NK-979-1
4820-01-182-9242POSSIBLE MATCH
LINK,VALVE
5342-01-182-9243POSSIBLE MATCH
CLEVIS,VALVE,TRIP
3040-01-182-9496POSSIBLE MATCH
LEVER,REMOTE CONTROL
5340-01-184-7858POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
4730-01-706-6198POSSIBLE MATCH
REPAIR KIT,PIPE,EMERGENCY DAMAGE
NP415
Frequently Asked Questions
What is NSN 4820-01-179-6565?
NSN 4820-01-179-6565 is a Guide,valve Stem, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-179-6565?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-182-9241, 4820-01-182-9242, 5342-01-182-9243. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-179-6565?
Key specifications for 4820-01-179-6565: Overall Length: 4.175 INCHES NOMINAL IN; Outside Diameter: 4.645 INCHES NOMINAL IN; Material: STEEL. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-179-6565 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.